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IVES 9 IVES Conference Series 9 OIV 9 OIV 2024 9 Short communications - Economy and law 9 Assessing the benefits of irrigation access: the case of Southern France vineyards

Assessing the benefits of irrigation access: the case of Southern France vineyards

Abstract

Agriculture worldwide is threatened by climate change. In particular, declining water resource availability combined with increasing water demand is a key challenge in many rainfed areas, where irrigation appears to be a straightforward adaptation option. In this context, assessing the impacts of irrigation adoption on farm yields and incomes is a necessary step to reflect on the impact of both ex-post and ex-ante policies. We develop an empirical setting to assess the benefits of irrigation access and adoption on estates located in the languedoc-roussillon wine producing basin between 2010 and 2020, when new irrigation networks have been developed. We merge data from the national agricultural census for each estate with fiscal data and wine register data. We rely on a propensity score matching analysis to assess the average treatment effect of different levels of irrigation intensity. We show that, on average, having more irrigated land leads to higher yields per hectare (5-10 additional hectoliters), however this doesn’t automatically translate into higher incomes. We discuss those impacts comparing different types of winegrowers.

Entwicklung der bewässerung der weinberge in sudfrankreich : bewertung der vorteile

Die landwirtschaft ist weltweit durch den klimawandel bedroht. Insbesondere die abnehmende verfügbarkeit von wasserressourcen in verbindung mit dem steigenden wasserbedarf ist eine zentrale herausforderung in vielen regengespeisten gebieten, in denen die bewässerung eine unkomplizierte anpassungsoption zu sein scheint. In diesem zusammenhang ist die bewertung der auswirkungen der bewässerung auf die landwirtschaftlichen erträge und einkommen ein notwendiger schritt, um über die auswirkungen von ex-post- und ex-ante-maßnahmen nachzudenken. Wir entwickeln einen empirischen rahmen, um die vorteile des zugangs zur bewässerung und der einführung der bewässerung auf weingütern im weinbaugebiet languedoc-roussillon zwischen 2010 und 2020 zu bewerten, wenn neue bewässerungsnetze entwickelt worden sind. Wir führen daten aus der nationalen landwirtschaftszählung für jedes weingut mit steuerdaten und weinregisterdaten zusammen. Wir stützen uns auf eine propensity-score-matching-analyse, um den durchschnittlichen behandlungseffekt der verschiedenen bewässerungsintensitäten zu bewerten. Wir zeigen, dass eine höhere bewässerungsintensität im durchschnitt zu höheren erträgen pro hektar führt (5-10 zusätzliche hektoliter), was sich jedoch nicht automatisch in höheren einkommen niederschlägt. Wir erörtern diese auswirkungen im vergleich verschiedener winzertypen.

Evaluer les bénéfices de l’accès à l’irrigation : le cas des vignobles du sud de la France

L’agriculture mondiale est menacée par le changement climatique. En particulier, la diminution de la disponibilité des ressources en eau combinée a l’augmentation de la demande est un défi majeur dans de nombreuses zones, où l’irrigation semble etre une option d’adaptation relativement simple. Dans ce contexte, l’évaluation de l’impact de l’adoption de l’irrigation sur les rendements et les revenus agricoles est une etape nécessaire pour réfléchir a l’impact de ces politiques d’adaptation, ex-post et ex-ante. Nous développons un cadre empirique pour evaluer les bénéfices de l’accès a l’irrigation dans les exploitations viticoles du languedoc-roussillon entre 2010 et 2020, période au cours de laquelle de nouveaux réseaux collectifs ont eté développés. Nous fusionnons les données du recensement national de l’agriculture pour chaque domaine avec les données fiscales et les déclarations de production viticole. Nous développons une analyse d’appariement par score de propension pour evaluer l’effet de traitement moyen de différents niveaux d’intensité d’irrigation. Nous montrons qu’en moyenne, le fait d’avoir plus de terres irriguées conduit a des rendements plus elevés par hectare (entre 5 et 10 hl supplémentaires), mais cela ne se traduit pas automatiquement par des revenus plus elevés. Nous discutons ces impacts en comparant différents types d’exploitations viticoles.

Publication date: November 18, 2024

Issue: OIV 2024

Type: Article

Authors

Juliette Le Gallo¹, Nina Graveline¹

¹ INRAE – Montpellier, France

Contact the author*

Tags

IVES Conference Series | OIV | OIV 2024

Citation

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